@incollection{JEDP_1983____A16_0,
     author = {Dermenjian, Yves and Guillot, Jean-Claude},
     title = {Th\'eorie spectrale de la propagation des ondes acoustiques dans un milieu stratifi\'e perturbe},
     booktitle = {},
     series = {Journ\'ees \'equations aux d\'eriv\'ees partielles},
     eid = {16},
     pages = {1--8},
     publisher = {Ecole polytechnique},
     year = {1983},
     zbl = {0533.35069},
     language = {fr},
     url = {http://archive.numdam.org/item/JEDP_1983____A16_0/}
}